COrdering-2.3.1: CHANGELOG.md

# 2.3.1

* Class `Typeable1` is no longer a thing.

# 2.3

* No code changes, just reclaiming ownership and bumping version No.

# 2.2 (Final release)

* No code changes.
* Removed link to Haskell wiki homepage as this will never be done.
* Removed link to maintainer email.

# 2.1

* Initial Hackage/Cabal release.
  Version set to 2.1 to distinguish from the 2.0 (non-cabal) release on my home page.